This Reference Specification covers requirements for drilled pier construction and applies to drilled piers of 30 in. ( mm) diameter and larger. The Contractor. ACI – Specifications for the Construction of Drilled Piers – Download as PDF File .pdf), Text File .txt) or read online. ACI Reference Specification for the Construction of Drilled Piers. standard by American Concrete Institute, 01/01/ View all.
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Amazon Rapids Fun stories for kids on the go. Even ac the case of high-bending moments, full-depth reinforcement may not be necessary depending on the aic of the pier and the soil profile. With end bearing 2. More like this Similar Items. Provide all test equipment required for the tests specified in 36.1 2. Excluding local code restrictions, piers excavated in some dense and hard clay soil could safely remain open more than one day.
Check the concrete level before, during, and after withdrawing casing to confirm that separation of shaft concrete has not occurred. If the socket requires a specific groove width, depth, and spacing, this should be specified.
Insert the pig at the top and then place concrete pushing the pig ahead, separating the concrete from the drilled pier excavation fluid. With end bearing b.
Some field conditions, however, such as nearby existing structures, require special treatment. It does not 3336.1 a part of Specification ACI Specify depth of probe if different than specification. There are instances, however, when a maximum diameter should be specified in the Contract Documents due to adjacent obstructions or existing construction.
Combinations of retarders and high-range water-reducing admixtures used to extend fluid properties should be tested in advance of construction and should meet requirements of ACI The center at the bottom shall be determined in the same manner as for the center at cut-off. Judgment may be required in interpreting test results to account for sample disturbance and 33.1 presence of sand and silt seams in the cohesive stratum.
The selection of the concrete characteristics and construction method should be consistent with Table 2. However, formatting rules can vary widely between applications and fields of interest or study. Would you also like to submit a review for this item? Pig—Device inserted into a tremie or pump pipe to separate the concrete from the pier excavation fluid inside the pipe.
In uncased holes, maintaining an accurate depth-versus-concrete volume plot to confirm absence of side wall caving during concreting is much simpler if concrete is pumped rather than gravity tremie placed. 36.1 concrete supplier provides quality control of the mixture sent to the site, making periodic cylinders for strength testing. The probability of some defects occurring during construction is recognized in design by the relatively low values of allowable stress permitted in the concrete compared to above-ground construction.
Because drilled piers require that Contractors have specific knowledge and expertise, the following actions should be ac of all bidders: Thus, even where the steel is not required structurally, acceptance of greater than 6 in.
As a result, the pipe, upon initial discharge, can be closer to the bottom 4 in. Specify Grade of reinforcement. Box Farmington Hills, Mich.
When the pipe is filled with concrete, lift the pipe off the bottom the minimum amount needed to start the concrete flowing. American Concrete Institute P. This specification covers requirements for drilled pier construction. Create lists, bibliographies and reviews: Reviews User-contributed reviews Add a review and share your thoughts with other readers.
R Specification for the Construction of Drilled Piers: ACI: : Books
Whether and what percent of piers need to be probed should be specified. Aic E-mail Address es you entered is are not in a valid format.
A statement such as the following will serve to make ACI Specification CopyrightAmerican Concrete Institute. Because the design bearing value is based on certain assumptions with regard to strength and compressibility, the Design Geotechnical Engineer should decide the type and amount of testing necessary to satisfy the design assumptions.
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Share your thoughts with other customers. Ervay, Suite Dallas, Tex. Maintain the slurry level above any unstable zones a sufficient distance to prevent caving or sloughing of those zones. Casing—A permanent or temporary steel cylinder used to resist earth and water pressures, to serve as a concrete form, and to protect personnel.
Don’t have an account? The anchorage can then be set under more closely controlled conditions. Clear all obstructions encountered during excavation. If the element to be anchored is cast-in-place concrete, the tolerance is usually less tight.